JP7147698B2 - Wheelchair occupant restraint system - Google Patents

Description

The present invention relates to a wheelchair occupant restraint system.

Patent Literature 1 discloses a wheelchair securing device for securing a wheelchair in a vehicle compartment. In Patent Document 1, belt members are provided on left and right frames of the wheelchair, respectively, and the wheelchair is lashed by connecting each belt member to a lashing member on the floor side. In addition, the occupant is restrained by the wheelchair by connecting the left and right belt members with the seat belt. On the other hand, Patent Literature 2 discloses a fixing device that lashes (fixes) a wheelchair in a vehicle compartment with a pair of belt-type restraint means.

JP-A-2002-209946 JP-A-8-89532

The structure described in Patent Literature 1 requires a wheelchair in which a dedicated belt member is attached in advance to the wheelchair frame, and thus has low versatility. As a countermeasure, referring to the technique disclosed in Patent Document 2, a method of securing the wheelchair using a two-point seat belt and restraining the occupant using another two-point seat belt is conceivable. However, there is room for improvement in terms of shortening the time required for securing the wheelchair and restraining the occupant.

In view of the above facts, the present invention provides a wheelchair occupant restraint system capable of shortening the time required for securing the wheelchair and restraining the occupant.

A wheelchair occupant restraint system according to claim 1 comprises a wheelchair retractor disposed in a vehicle interior for winding one end of a wheelchair belt member so as to be pulled out, and an opposite side of the wheelchair retractor to a space for securing the wheelchair. and a wheelchair buckle to which a wheelchair tongue plate attached to the other end of the wheelchair belt member can be mounted, and a wheelchair buckle arranged on the opposite side of the wheelchair retractor with respect to the lashing space. an occupant retractor for winding one end of an occupant belt member so as to be able to draw it out; an occupant buckle to which an occupant tongue plate attached to can be attached.

In the wheelchair occupant restraint system according to claim 1, the wheelchair retractor is disposed in the vehicle compartment, and one end of the wheelchair belt member is retractably wound around the wheelchair retractor. A wheelchair tongue plate is attached to the other end of the wheelchair belt member. It can be attached to the buckle. As a result, with the wheelchair moved to the wheelchair securing space, the wheelchair can be secured by pulling out the wheelchair belt member from the wheelchair retractor, passing it through the wheelchair frame, etc., and attaching the wheelchair tongue plate to the wheelchair buckle. can be tied up.

An occupant retractor is disposed on the opposite side of the wheelchair retractor with respect to the lashing space, and one end of the occupant belt member is retractably wound around the occupant retractor. Further, an occupant tongue plate is attached to the other end of the occupant belt member. It can be attached to the buckle. Thus, the occupant of the wheelchair can be restrained by pulling out the occupant belt member from the occupant retractor and attaching the occupant tongue plate to the occupant buckle while the wheelchair is secured.

Here, the occupant retractor is arranged on the same side of the lashing space as the wheelchair buckle. Accordingly, after the wheelchair tongue plate is attached to the wheelchair buckle, the occupant belt member can be pulled out from the occupant retractor, and the occupant can be restrained smoothly.

A wheelchair occupant restraining device according to claim 2 is the wheelchair occupant restraint device according to claim 1, wherein the occupant retractor and the wheelchair buckle are arranged at different heights in the vertical direction of the vehicle.

In the wheelchair occupant restraint system according to claim 2, the occupant retractor and the wheelchair buckle are arranged at different heights, so that after the wheelchair is secured, the occupant belt member is pulled out from the occupant retractor and the occupant is restrained. When restraining the wheelchair, the belt member for the wheelchair is less likely to get in the way.

A wheelchair occupant restraining device according to claim 3 is the wheelchair occupant restraining device according to claim 1 or 2, wherein the occupant retractor and the wheelchair buckle are disposed at different positions with respect to the lashing space.

In the wheelchair occupant restraint system according to claim 3, the occupant retractor and the wheelchair buckle are arranged at different positions with respect to the lashing space, so that after the wheelchair is lashed, the occupant belt is removed from the occupant retractor. When the member is pulled out to restrain the occupant, the wheelchair belt member is less likely to get in the way.

A wheelchair occupant restraint device according to claim 4 is, in any one of claims 1 to 3, a buckle sensor for detecting that the wheelchair tongue plate is attached to the wheelchair buckle, and the occupant retractor. and a lock mechanism for locking and unlocking the drawer of the occupant belt member from, when the buckle sensor detects that the wheelchair tongue plate is attached to the wheelchair buckle, the lock mechanism The occupant belt member can be pulled out.

In the wheelchair occupant restraint system according to claim 4, the locked state of the occupant retractor is released by the lock mechanism by attaching the wheelchair tongue plate to the wheelchair buckle. As a result, the passenger belt member can be pulled out from the passenger retractor.

A wheelchair occupant restraining device according to claim 5 is the wheelchair occupant restraint device according to claim 4, wherein the lock mechanism is configured to be electrically switchable between locking and unlocking of the occupant belt member.

The wheelchair occupant restraint device according to claim 5 can have a simpler structure than a configuration that mechanically switches between locking and unlocking of the occupant belt member.

A wheelchair occupant restraint system according to claim 6 is the wheelchair occupant restraint system according to claim 5, further comprising an acceleration sensor for electrically detecting acceleration acting on the vehicle, and the occupant retractor is configured such that the acceleration detected by the acceleration sensor reaches a predetermined value. In at least one of the above cases and the case in which the angle of the vehicle with respect to the horizontal is equal to or greater than a predetermined value, the drawer of the passenger belt member is locked.

In the wheelchair occupant restraint system according to claim 6, the drawer of the occupant belt member can be locked when the acceleration (deceleration) acting on the vehicle exceeds a predetermined value, for example, in the event of a vehicle collision. . In addition, even when the angle (inclination) of the vehicle with respect to the horizontal becomes a predetermined value or more due to driving on a steep road, etc., the drawer of the belt member for the passenger can be locked, and the passenger in the wheelchair can be prevented. can be constrained well.

A wheelchair occupant restraining device according to claim 7 is the wheelchair occupant restraint device according to any one of claims 1 to 6, wherein the wheelchair retractor and the occupant retractor are attached to the wheelchair by erected members erected in the vehicle interior. It is positioned at a height within reach of the seated occupant.

In the wheelchair occupant restraint system according to claim 7, the occupant seated in the wheelchair can pull out the wheelchair belt member from the wheelchair retractor provided on the standing member. Similarly, an occupant seated in a wheelchair can pull out the occupant belt member from the occupant retractor. The "reachable height for a passenger seated in a wheelchair" as used herein refers to the reachable height for an adult woman of a standard body type while seated in a wheelchair.

As described above, according to the wheelchair occupant restraint system according to claim 1, it is possible to shorten the time required for securing the wheelchair and restraining the occupant.

According to the wheelchair occupant restraint device according to claim 2, the occupant can be restrained smoothly compared to a structure in which the occupant retractor and the wheelchair buckle are arranged at the same height.

According to the wheelchair occupant restraint system according to claim 3, the occupant can be restrained smoothly compared to a structure in which the occupant retractor and the wheelchair buckle are arranged at the same distance from the lashing space. can be done.

According to the wheelchair occupant restraint system according to claim 4, it is possible to prevent forgetting to fasten the wheelchair.

According to the wheelchair occupant restraint device according to claim 5, the locking mechanism can be made smaller in comparison with a configuration in which locking and unlocking of the occupant belt member are mechanically switched.

According to the wheelchair occupant restraint system of claim 6, the safety performance for the wheelchair occupant can be improved.

According to the wheelchair occupant restraint system according to claim 7, the wheelchair can be lashed by the hands of the occupant seated on the wheelchair.

1 is a side view of the interior of a vehicle to which the wheelchair occupant restraint system according to the embodiment is applied, viewed from the width direction of the vehicle; BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a plan view of the interior of a vehicle to which the wheelchair occupant restraint system according to the embodiment is applied, as viewed from above the vehicle; 1 is a block diagram showing a hardware configuration of a wheelchair occupant restraint system according to an embodiment; FIG. 4 is a flowchart showing lock switching processing when restraining an occupant; FIG. 11 is a flow chart showing emergency lock switching processing in a passenger restraint state; FIG. It is a side view corresponding to FIG. 1 which shows the modification of the wheelchair occupant restraint apparatus which concerns on embodiment.

A wheelchair occupant restraint system 10 according to an embodiment will be described below with reference to the drawings. Note that arrows FR, UP, and RH in each figure respectively indicate the traveling direction (front side of the vehicle), the upper side of the vehicle, and the right side of the vehicle to which the wheelchair occupant restraint system is applied. Unless otherwise specified, front, rear, left, right, up, and down directions, front and rear directions of the vehicle, left and right when the vehicle is facing the traveling direction, and up and down directions of the vehicle.

As shown in FIGS. 1 and 2, a lashing space S for lashing a wheelchair 100 is set in a vehicle 12 to which the wheelchair occupant restraint system 10 of the present embodiment is applied. On the rear side of the space S, an upright wall 14 is provided as an upright member.

The vertical wall 14 is erected on the floor panel 16 and extends in the vehicle vertical direction and vehicle width direction, and includes a belt fixing plate 20 , a support plate 22 and a cover 24 . The belt fixing plate 20 is positioned below the standing wall 14 and extends in the vehicle width direction with the vehicle front-rear direction as the plate thickness direction. The right end of the belt fixing plate 20 is fixed to the side wall 18 of the vehicle compartment, and the left end of the belt fixing plate 20 is a handrail erected on the floor panel 16 as an upright member. 26 is fixed.

The handrail 26 is formed in a substantially columnar shape and extends up to the ceiling of the vehicle 12 . Further, the end portion of the support plate 22 on the left side of the vehicle is fixed to the handrail 26 .

The support plate 22 is positioned above the standing wall 14 and constitutes a receiving surface capable of supporting the wheelchair 100 from the rear side of the vehicle. Specifically, the support plate 22 extends in the vehicle width direction on the vehicle front side of the belt fixing plate 20 with the vehicle front-rear direction as the plate thickness direction. The end of the support plate 22 on the right side of the vehicle is fixed to the side wall 18 of the vehicle compartment, and the end of the support plate 22 on the left side of the vehicle is fixed to the handrail 26 as described above.

The cover 24 is an interior trim and stands on the floor panel 16 . The cover 24 covers the belt fixing plate 20 and the support plate 22 as a whole.

Here, a wheelchair retractor 30 , a wheelchair buckle 32 , an occupant retractor 34 and an occupant buckle 36 are attached to the belt fixing plate 20 . In FIG. 1, for convenience of explanation, the heights of the wheelchair retractor 30 and the wheelchair buckle 32 are depicted as different heights, but in this embodiment, they are arranged at substantially the same height. Similarly, the heights of the occupant retractor 34 and the occupant buckle 36 are depicted as different heights, but in the present embodiment they are arranged at approximately the same height.

A first attachment piece 20A extends from the lower end of the belt fixing plate 20 toward the vehicle front side. As shown in FIG. 2, the first attachment piece 20A is provided on the vehicle right side with respect to the lashing space S. As shown in FIG. Here, "the right side of the vehicle with respect to the lashing space S" refers to the right side of the vehicle from the center of the lashing space S in the vehicle width direction. A wheelchair retractor 30 is fastened to the first attachment piece 20A with bolts and nuts.

As shown in FIG. 1, the wheelchair retractor 30 has a spool 30A, and one end of a wheelchair belt member 31 is retractably wound around the spool 30A. Since the spool 30A is urged in the direction of winding the wheelchair belt member 31 by a return spring (not shown), the wheelchair belt member 31 is wound around the wheelchair retractor 30 in an unloaded state except for the other end. It is in a state where Here, in this embodiment, as an example, the wheelchair retractor 30 is fastened to the first mounting piece 20A in an inclined state so that the wheelchair belt member 31 can be pulled out obliquely toward the front side of the vehicle and the upper side of the vehicle. .

In the wheelchair retractor 30, when the wheelchair belt member 31 is pulled out to the end, the lock mechanism is activated, the wheelchair belt member 31 is locked at the returned position, and the wheelchair belt member 31 is automatically locked so that it cannot be pulled out again unless it is returned to the end. A mechanism (ALR: Automatic Locking Retractor) is provided. Furthermore, the wheelchair retractor 30 includes an emergency locking mechanism (ELR) that restricts the withdrawal of the wheelchair belt member 31 when the wheelchair belt member 31 is suddenly withdrawn, such as when the vehicle 12 collides. there is

The wheelchair belt member 31 is made of the same cloth material as the webbing for restraining the occupant P and is formed in an elongated shape. That is, the wheelchair belt member 31 is made of the same cloth material as the occupant belt member 35, which will be described later. Further, in the present embodiment, as an example, a mark imitating a wheelchair is drawn on one surface of the wheelchair belt member 31 so that it can be intuitively recognized as a belt for securing the wheelchair 100. It's becoming Furthermore, a wheelchair tongue plate 33 is attached to the other end of the wheelchair belt member 31 .

As shown in FIG. 2, a second mounting piece 20B is provided on the vehicle left side of the first mounting piece 20A. The second mounting piece 20B extends toward the front of the vehicle from the lower end of the belt fixing plate 20 in the same manner as the first mounting piece 20A, and the wheelchair buckle 32 is fastened to the second mounting piece 20B with bolts and nuts. It is

The wheelchair buckle 32 is arranged on the opposite side of the wheelchair retractor 30 with respect to the lashing space S, and a wheelchair tongue plate 33 can be attached to the wheelchair buckle 32 . Further, the wheelchair buckle 32 is provided with a buckle sensor 64 for detecting that the wheelchair tongue plate 33 is attached to the wheelchair buckle 32 (see FIG. 3). Here, “the opposite side of the wheelchair retractor 30 with respect to the lashing space S” refers to the opposite side of the wheelchair retractor 30 with respect to the center of the lashing space S in the vehicle width direction. Further, the wheelchair buckle 32 of the present embodiment is arranged such that the insertion hole of the wheelchair tongue plate 33 is directed obliquely toward the vehicle front side and the vehicle upper side so that the wheelchair tongue plate 33 can be easily attached. is fastened to the second attachment piece 20B in an inclined state.

1 and 2 show a state in which the wheelchair tongue plate 33 is attached to the wheelchair buckle 32 through the frame 100A of the wheelchair 100, and the wheelchair 100 is lashed in this state.

A third attachment piece 20C is provided on the vehicle left side of the second attachment piece 20B. The third attachment piece 20C extends forward from the upper end of the belt fixing plate 20, and the occupant retractor 34 is fastened to the third attachment piece 20C with bolts and nuts. That is, the occupant retractor 34 and the wheelchair buckle 32 are arranged at different positions with respect to the lashing space S, and in the present embodiment, the occupant retractor 34 is located closer to the lashing space S than the wheelchair buckle 32 located far from the The occupant retractor 34 and the wheelchair buckle 32 are arranged at different heights in the vertical direction of the vehicle. It is

As shown in FIG. 1, the occupant retractor 34 has a spool 34A, and one end of an occupant belt member 35 is retractably wound around the spool 34A. Since the spool 34A is urged in a direction in which the occupant belt member 35 is wound up by a return spring (not shown), the occupant belt member 35 is wound around the occupant retractor 34 in an unloaded state except for the other end. It is in a state where Here, in this embodiment, as an example, the occupant retractor 34 is fastened to the third mounting piece 20C in an inclined state so that the occupant belt member 35 is pulled out obliquely toward the vehicle front side and the vehicle upper side. .

The occupant retractor 34 is provided with an emergency locking mechanism (ELR) for restricting the withdrawal of the occupant belt member 35 when the occupant belt member 35 is suddenly withdrawn in the event of a collision of the vehicle 12 or the like. there is

The occupant retractor 34 also includes a lock mechanism 62 that locks and unlocks the drawer of the occupant belt member 35. The lock mechanism 62 electrically switches between locking and unlocking of the occupant belt member 35. (See FIG. 3). As such a lock mechanism, a lock mechanism 62 using a solenoid and a lock lever is employed in this embodiment. In this lock mechanism 62, when the solenoid is energized, the lock lever is moved to unlock the spool 34A. When the solenoid is not energized, the lock lever moves to the opposite side to lock the spool 34A. make the state

As shown in FIG. 2, a fourth attachment piece 20D is provided on the vehicle right side of the first attachment piece 20A. Like the third mounting piece 20C, the fourth mounting piece 20D extends from the upper end of the belt fixing plate 20 toward the vehicle front side, and the passenger buckle 36 is fastened to the fourth mounting piece 20D with bolts and nuts. It is That is, the occupant buckle 36 is arranged at a position farther from the lashing space S than the wheelchair retractor 30 . In addition, the passenger buckle 36 is arranged on the vehicle upper side of the wheelchair retractor 30 .

The occupant buckle 36 is arranged on the opposite side of the lashing space S from the occupant retractor 34 . An occupant tongue plate 37 attached to the other end of the occupant belt member 35 can be attached to the occupant buckle 36 . In addition, the wheelchair buckle 36 of the present embodiment is arranged so that the insertion hole of the passenger tongue plate 37 is directed obliquely toward the vehicle front side and the vehicle upper side so that the passenger tongue plate 37 can be easily attached. is fastened to the fourth attachment piece 20D in an inclined state.

As described above, in this embodiment, the wheelchair retractor 30 , the wheelchair buckle 32 , the passenger retractor 34 and the passenger buckle 36 are arranged on the belt fixing plate 20 forming the vertical wall 14 . Therefore, the wheelchair retractor 30, the wheelchair buckle 32, the passenger retractor 34, and the passenger buckle 36 are within reach of the passenger P seated on the wheelchair 100. As shown in FIG.

FIG. 3 is a block diagram showing the hardware configuration of the wheelchair occupant restraint system 10. As shown in FIG. As shown in FIG. 3, the wheelchair occupant restraint system 10 includes an ECU (Electrical Control Unit) 50 as a control section. The ECU 50 also includes a CPU (Central Processing Unit: processor) 52 , a ROM (Read Only Memory) 54 , a RAM (Random Access Memory) 56 , a storage 58 and an input/output interface 60 . Each component is communicably connected to each other via a bus 51 .

The CPU 52 is a central processing unit that executes various programs and controls each section. That is, the CPU 52 reads a program from the ROM 54 or the storage 58 and executes the program using the RAM 56 as a work area. The CPU 52 performs control of the above components and various arithmetic processing according to programs recorded in the ROM 54 or the storage 58 .

The ROM 54 stores various programs and various data. The RAM 56 temporarily stores programs or data as a work area. The storage 58 is configured by a HDD (Hard Disk Drive) or SSD (Solid State Drive) and stores various programs including an operating system and various data. In this embodiment, the ROM 54 or the storage 58 stores a lock switching processing program for switching the lock mechanism 62 when the occupant P is restrained, a lock switching processing program for switching the lock mechanism 62 in an emergency when the occupant is restrained, and the like. there is

The input/output interface 60 is connected to a lock mechanism 62 (passenger retractor 34) and a buckle sensor 64 (wheelchair buckle 32). An acceleration sensor 66 that electrically detects acceleration (deceleration) acting on the vehicle 12 is connected to the input/output interface 60 . As an example, the acceleration sensor 66 of the present embodiment is configured to be able to electrically detect acceleration on two front, rear, left, and right axes. Then, the passenger retractor 34 is controlled based on the signal from the ECU 50 .

(An example of lock switching processing)
Here, when the buckle sensor 64 detects that the wheelchair tongue plate 33 is attached to the wheelchair buckle 32 , the ECU 50 allows the passenger belt member 35 to be pulled out by the lock mechanism 62 . In addition, the ECU 50 controls the lock mechanism 62 to lock the occupant when the acceleration detected by the acceleration sensor 66 is equal to or greater than a predetermined value and/or when the angle (inclination) of the vehicle 12 with respect to the horizontal is equal to or greater than a predetermined value. The drawer of the belt member 35 is locked. An example of this lock switching process will be described with reference to the flow charts of FIGS. 4 and 5. FIG. This lock switching process is executed by the CPU 52 reading out a lock switching program from the ROM 54 or the storage 58, developing it in the RAM 56, and executing it. First, the lock switching process when the passenger P is restrained will be described with reference to FIG. 4, and then the lock switching process in an emergency will be described with reference to FIG.

As shown in FIG. 4, in step S102, the CPU 52 causes the lock mechanism 62 to lock the drawer of the passenger belt member 35. As shown in FIG. That is, the lock mechanism 62 is switched to the locked state. When the lock mechanism 62 is in the locked state, it maintains the locked state.

The CPU 52 determines whether or not the buckle sensor 64 of the wheelchair buckle 32 is ON in step S104. When the wheelchair tongue plate 33 is attached to the wheelchair buckle 32, a signal is transmitted from the buckle sensor 64 to the ECU 50, and the CPU 52 determines that the buckle sensor 64 is turned ON. Further, when the wheelchair tongue plate 33 is not attached to the wheelchair buckle 32, the buckle sensor 64 is OFF, that is, it is determined that it is not ON.

When the CPU 52 determines in step S104 that the buckle sensor 64 is ON, the process proceeds to step S106. Further, when the CPU 52 determines in step S104 that the buckle sensor 64 is not ON, the CPU 52 terminates the lock switching process.

The CPU 52 cancels the locked state by the lock mechanism 62 in step S106. Specifically, by energizing the solenoid, the lock lever is moved to bring the spool 34A of the occupant retractor 34 into the unlocked state. As a result, the spool 34</b>A becomes rotatable, and the passenger belt member 35 can be pulled out from the passenger retractor 34 .

Subsequently, the CPU 52 determines whether or not the buckle sensor 64 is turned off in step S108. That is, when the occupant P of the wheelchair 100 gets off, the occupant belt member 35 is removed, and then the wheelchair tongue plate 33 binding the wheelchair 100 is removed from the wheelchair buckle 32 . As a result, a signal is transmitted from the buckle sensor 64 to the ECU 50, and the CPU 52 determines that the buckle sensor 64 is turned off. Further, when the wheelchair tongue plate 33 is maintained attached to the wheelchair buckle 32, the CPU 52 determines that the buckle sensor 64 is maintained in the ON state. That is, the CPU 52 determines that the buckle sensor 64 is not OFF.

When the CPU 52 determines in step S108 that the buckle sensor 64 is OFF, the process proceeds to step S110. If the CPU 52 determines in step S108 that the buckle sensor 64 is not OFF, it terminates the lock switching process.

In step S110, the CPU 52 causes the lock mechanism 62 to lock the pull-out of the passenger belt member 35, and terminates the lock switching process. That is, the lock mechanism 62 is switched to the locked state, and the passenger's belt member 35 cannot be pulled out from the passenger's retractor 34 .

Next, with reference to FIG. 5, the emergency lock switching process when the passenger P is restrained will be described.

As shown in FIG. 5, the CPU 52 determines whether or not the acceleration of the vehicle 12 is equal to or greater than a predetermined threshold (predetermined value) in step S202. When the acceleration (deceleration) of the vehicle 12 detected by the acceleration sensor 66 is greater than or equal to a predetermined value, the CPU 52 shifts the process to step S204. Further, when the acceleration (deceleration) of the vehicle 12 detected by the acceleration sensor 66 is smaller than a predetermined threshold value, the CPU 52 shifts the process to step S210.

If the acceleration of the vehicle 12 is greater than or equal to the predetermined value, the CPU 52 causes the lock mechanism 62 to lock the pull-out of the passenger belt member 35 in step S204. That is, the locking mechanism 62 is electrically switched to lock the spool 34A. By locking the pull-out of the passenger belt member 35 in this manner, inertial movement of the passenger P is suppressed.

Next, the CPU 52 determines in step 206 whether or not the acceleration of the vehicle 12 is smaller than a predetermined threshold (predetermined value). That is, when the acceleration of the vehicle 12 detected by the acceleration sensor 66 becomes smaller than a predetermined value, the CPU 52 shifts the process to step S208. Further, when the acceleration of the vehicle 12 is not smaller than the predetermined threshold value, that is, when the acceleration of the vehicle 12 is maintained at the predetermined value or more, the CPU 52 repeats the process of step S206.

The CPU 52 cancels the locked state by the lock mechanism 62 in step S208. That is, by energizing the solenoid, the lock lever is moved to bring the spool 34A of the passenger retractor 34 into the unlocked state. Then, the lock switching process is ended.

On the other hand, when the acceleration of the vehicle 12 detected by the acceleration sensor 66 in step S202 is smaller than the predetermined threshold value, the CPU 52 proceeds to the process of step S210 as described above.

The CPU 52 determines whether or not the tilt of the vehicle 12 is greater than the normal range in step S210. In this embodiment, as an example, the angle (inclination) of the vehicle 12 with respect to the horizontal is calculated based on the signal from the acceleration sensor 66 . Then, when this angle is equal to or greater than the predetermined value, the CPU 52 determines that the inclination of the vehicle 12 is greater than the normal range, and causes the process to proceed to step S212. Further, when the angle of the vehicle 12 with respect to the horizontal is smaller than a predetermined value, the CPU 52 determines that the tilt of the vehicle 12 is within the normal range, and terminates the lock switching process. That is, when the acceleration of the vehicle 12 is smaller than the predetermined value and the tilt of the vehicle 12 is within the normal range, the process is terminated without switching the lock mechanism 62 .

The CPU 52 causes the lock mechanism 62 to lock the drawer of the passenger belt member 35 in step S212. That is, the locking mechanism 62 is electrically switched to lock the spool 34A. By locking the pull-out of the passenger belt member 35, the inertial movement of the passenger P is suppressed.

The CPU 52 determines whether the tilt of the vehicle 12 is within the normal range in step S214. Then, when the angle of the vehicle 12 with respect to the horizontal is smaller than the predetermined value, the CPU 52 determines that the inclination of the vehicle 12 is within the normal range, and causes the process to proceed to step S216. Further, when the angle is equal to or greater than the predetermined value, the CPU 52 determines that the inclination of the vehicle 12 is larger than the normal range, and repeats the process of step S214.

The CPU 52 cancels the locked state by the lock mechanism 62 in step S216. That is, by energizing the solenoid, the lock lever is moved to bring the spool 34A of the passenger retractor 34 into the unlocked state. Then, the lock switching process is ended.

(Action)
Next, the operation of this embodiment will be described.

In the wheelchair occupant restraint device 10 according to the present embodiment, as shown in FIGS. 1 and 2, the wheelchair belt member 31 is pulled out from the wheelchair retractor 30 while the wheelchair 100 is moved to the lashing space S. The wheelchair 100 can be secured by passing it through the frame 100A of the wheelchair 100 and attaching the tongue plate 33 for the wheelchair to the buckle 32 for the wheelchair. Further, when the passenger belt member 35 is pulled out from the passenger retractor 34 and the passenger tongue plate 37 is attached to the passenger buckle 36 while the wheelchair 100 is secured, the passenger P of the wheelchair 100 can be restrained. can.

Here, the occupant retractor 34 of this embodiment is arranged on the same side of the lashing space S as the wheelchair buckle 32 . As a result, after the occupant P attaches the wheelchair tongue plate 33 to the wheelchair buckle 32 , the occupant belt member 35 can be continuously pulled out from the occupant retractor 34 . That is, the occupant P can be restrained smoothly, and the time required for securing the wheelchair 100 and restraining the occupant P can be shortened.

Further, in this embodiment, as shown in FIG. 1 , the occupant retractor 34 and the occupant buckle 36 for restraining the occupant P are replaced by the wheelchair retractor 30 and the wheelchair buckle 32 for securing the wheelchair 100 . Since the wheelchair belt member 31 is disposed on the upper side of the vehicle, the wheelchair belt member 31 does not become an obstacle when the occupant P is restrained.

Furthermore, in the present embodiment, as shown in FIG. 2, the occupant retractor 34 and the occupant buckle 36 are arranged farther from the lashing space S than the wheelchair retractor 30 and the wheelchair buckle 32. . Therefore, in this respect as well, the wheelchair belt member 31 does not become an obstacle when restraining the occupant P, and the occupant P can be restrained smoothly.

Furthermore, in this embodiment, as described with reference to the flowchart of FIG. 4 , by attaching the wheelchair tongue plate 33 to the wheelchair buckle 32 , the locked state of the passenger retractor 34 is released by the lock mechanism 62 . As a result, the wheelchair 100 needs to be lashed before the occupant P is restrained, and failure to lash the wheelchair 100 can be suppressed.

In particular, in the present embodiment, since the lock mechanism 62 is used to electrically switch the lock, the structure can be simpler than the structure for mechanically switching the locking and unlocking of the passenger belt member 35. can. That is, the lock mechanism 62 can be downsized.

Further, in the present embodiment, as described in the flowchart of FIG. 5, for example, when the acceleration (deceleration) acting on the vehicle 12 becomes equal to or greater than a predetermined value, such as when the vehicle 12 collides, the occupant belt member 35 drawers can be locked. Further, even when the angle (inclination) of the vehicle 12 with respect to the horizontal becomes a predetermined value or more due to traveling on a steep road, etc., the drawer of the passenger belt member 35 can be locked and the wheelchair 100 can be locked. occupant P can be restrained satisfactorily. That is, the safety performance for the passenger P can be improved.

Further, in this embodiment, a wheelchair retractor 30, a wheelchair buckle 32, an occupant retractor 34, and an occupant buckle 36 are attached to the belt fixing plate 20, as shown in FIG. As a result, the occupant P seated on the wheelchair 100 can pull out the wheelchair belt member 31 from the wheelchair retractor 30 and the occupant P can pull out the occupant belt member 35 from the occupant retractor 34. .

In this embodiment, a so-called two-point seat belt is used as the belt for restraining the occupant P, but the belt is not limited to this. For example, the modified structure shown in FIG. 6 may be adopted.

(Modification)
As shown in FIG. 6 , in a wheelchair occupant restraint system 70 of this modification, an occupant retractor 72 is attached to the handrail 26 . The occupant retractor 72 is arranged above the vehicle with respect to the support plate 22 and has a spool 72A. One end of an occupant belt member 74 is retractably wound around the spool 72A. Since the spool 72A is urged in a direction in which the occupant belt member 74 is wound up by a return spring (not shown), the occupant belt member 74 is wound around the occupant retractor 72 in an unloaded state except for the other end. It is in a state of being

The occupant retractor 72 is provided with an emergency locking mechanism (ELR) that restricts the withdrawal of the occupant belt member 74 when the occupant belt member 74 is suddenly withdrawn in the event of a collision of the vehicle 12 or the like. there is

The other end of the passenger belt member 74 is fixed to the third mounting piece 20C of the belt fixing plate 20. As shown in FIG. That is, in this modified example, the third attachment piece 20C functions as an anchor. An occupant tongue plate 37 is passed through the occupant belt member 74 , and the occupant tongue plate 37 is attached to the occupant buckle 36 .

Here, the occupant belt member 74 includes a shoulder belt portion 74A that restrains the occupant P and a lap belt portion 74B that restrains the lumbar portion of the occupant P. As shown in FIG. That is, the shoulder belt portion 74A is a portion drawn out from the occupant retractor 72 and obliquely extending from the left shoulder of the occupant P to the right waist. A lap belt portion 74B extends in the vehicle width direction from the right waist to the left waist.

As described above, in this modified example, the occupant P is restrained by the three-point seat belt, and the safety performance of the occupant P is further improved compared to the case where the occupant P is restrained by the two-point seat belt. can be made

Although the wheelchair occupant restraint system according to the embodiment and modifications has been described above, it goes without saying that the restraint system can be embodied in various forms without departing from the gist of the present invention. For example, in the above-described embodiment and modification, as shown in FIG. 2, the occupant retractor 34 is arranged at a position farther from the lashing space S than the wheelchair buckle 32, but the present invention is not limited to this. For example, if the occupant retractor 34 is arranged in the vehicle width direction at the same position as the wheelchair buckle 32 and above the wheelchair buckle 32, the wheelchair belt member 31 becomes an obstacle when the occupant P is restrained. without it. In addition, the occupant retractor 34 may be arranged at a position closer to the lashing space S than the wheelchair buckle 32 is.

Further, in the above-described embodiment and modification, as shown in FIG. 1, the occupant retractor 34 is arranged on the upper side of the vehicle than the wheelchair buckle 32, but the present invention is not limited to this. For example, if the occupant retractor 34 is arranged at the same height as the wheelchair buckle 32 in the vertical direction of the vehicle and at a position farther from the lashing space S than the wheelchair buckle 32, the wheelchair belt can be secured when the occupant P is restrained. The member 31 does not get in the way. Also, the occupant retractor 34 may be arranged on the lower side of the vehicle than the wheelchair buckle 32 .

Furthermore, in the above-described embodiment and modified example, as shown in FIG. 3, the lock mechanism 62 using a solenoid and a lock lever is configured to electrically switch between locking and unlocking of the occupant retractor 34. Not limited. For example, a motor or the like may be used to electrically switch between locking and unlocking of the occupant retractor 34 . Further, a lock mechanism for mechanically switching between locking and unlocking of the passenger belt member 35 may be provided. In this case, it is possible to switch between locking and unlocking of the passenger belt member 35 even when the power supply is interrupted.

Furthermore, in the above-described embodiment and modified example, a mark imitating a wheelchair is drawn on one surface of the wheelchair belt member 31, but the present invention is not limited to this. For example, the wheelchair belt member 31 and the occupant belt member 35 may be distinguished from each other by colors and patterns instead of marks. Further, the width of the wheelchair belt member 31 may be narrower than that of the occupant belt member 35 so that they can be distinguished from each other.

Also, the wheelchair buckle 32 and the occupant buckle 36 may employ an erroneous coupling prevention structure. That is, when another occupant's seat is arranged in the seat adjacent to the lashing space S, an erroneous coupling prevention structure may be employed so that the occupant tongue plate 37 is not erroneously attached to the buckle of the adjacent seat. As such an erroneous coupling prevention structure, a structure that changes the width and depth of the insertion holes for the wheelchair buckle 32 and the passenger buckle 36 may be employed.

Furthermore, in the embodiment and modification described above, the wheelchair retractor 30, the wheelchair buckle 32, the passenger retractor 34, and the passenger buckle 36 are arranged on the belt fixing plate 20, but the present invention is not limited to this. For example, wheelchair retractor 30 and wheelchair buckle 32 may be disposed on floor panel 16 . Even in this case, if the occupant retractor 34 is arranged on the same side as the wheelchair buckle 32 with respect to the lashing space S, the lashing of the wheelchair 100 by the caregiver or attendant of the occupant P and the occupant It is possible to shorten the time required to constrain P

10, 70 wheelchair occupant restraint device 30 wheelchair retractor 31 wheelchair belt member 32 wheelchair buckle 33 wheelchair tongue plate 34 occupant retractor 35 occupant belt member 36 occupant buckle 37 occupant tongue plate 62 lock mechanism 64 buckle sensor 66 Accelerometer 100 Wheelchair 100A Frame P Occupant S Lashing space

Claims (7)

a wheelchair retractor disposed in a vehicle interior for retractably winding one end of a wheelchair belt member;
a wheelchair buckle disposed on the side opposite to the wheelchair retractor with respect to the wheelchair lashing space and to which a wheelchair tongue plate attached to the other end of the wheelchair belt member can be attached;
an occupant retractor disposed on the opposite side of the wheelchair retractor with respect to the lashing space and retractably winding one end of the occupant belt member;
an occupant buckle disposed on the opposite side of the lashing space from the occupant retractor and to which an occupant tongue plate attached to the other end of the occupant belt member can be attached;
A wheelchair occupant restraint system comprising: The wheelchair occupant restraint system according to claim 1, wherein the occupant retractor and the wheelchair buckle are arranged at different heights in the vertical direction of the vehicle. The wheelchair occupant restraint system according to claim 1 or 2, wherein the occupant retractor and the wheelchair buckle are arranged at different positions with respect to the lashing space. a buckle sensor for detecting that the wheelchair tongue plate is attached to the wheelchair buckle;
a locking mechanism for locking and unlocking the drawer of the passenger belt member from the passenger retractor;
4. The lock mechanism enables the passenger belt member to be pulled out when the buckle sensor detects that the wheelchair tongue plate is attached to the wheelchair buckle. A wheelchair occupant restraint as described in . 5. The wheelchair occupant restraint device according to claim 4, wherein the lock mechanism is configured to be electrically switchable between locking and unlocking of the occupant belt member. Equipped with an acceleration sensor that electrically detects acceleration acting on the vehicle,
The occupant retractor pulls out the occupant belt member when at least one of the acceleration detected by the acceleration sensor is equal to or greater than a predetermined value and the angle of the vehicle with respect to the horizontal is equal to or greater than a predetermined value. 6. A wheelchair occupant restraint system according to claim 5, wherein the wheelchair occupant restraint system is configured to lock. 7. The wheelchair retractor and the occupant retractor are arranged on standing members erected in the passenger compartment at a height within reach of the occupant seated on the wheelchair. 10. A wheelchair occupant restraint system as described in paragraph 1 above.

Images